Can I manage weeds with boiling water?

Question:

Can I manage weeds with boiling water?

Answer:

Pouring boiling water on weeds can be used for control, especially in situations where other plants are not nearby, such as in cracks in patios or sidewalks.   Boiling water will act as a contact "herbicide", killing only the portion of the plant it comes in contact with. It will not kill roots or other plant parts in the soil. It is most effective on young, newly emerged annual weeds.

Affected plants will wilt almost immediately after treatment, but plant parts in contact with the boiling water will not brown until one to two days later.  Plants with established root systems will resprout after several days, at which time the boiling water can be applied again.

Managing weeds with boiling water is an organic option for weed control.

Be careful not to splash or burn yourself with the boiling water, and remember that the boiling water will damage both weeds and desirable plants.  A tea kettle is a good way to safely and precisely apply the boiling water directly to the weed.  Use plenty of water and plan to retreat 7-10 days later, as one application rarely kills the entire plant, especially deep-rooted weeds.